Blocker (Whenever an opponent's creature attacks, you may tap this creature to stop the attack. Then the 2 creatures battle.)This creature can't attack.This ocean ain't big enough for the two of us!

4

x

Aqua Hulcus (BS)

Collector Number: 23

Rarity: Common

Type: Creature

Race: Liquid People

Power: 2000

Mana Number: 1

Cost: 3

Civilization: Water

Artist: Eiji Kaneda

Card text:

When you put this creature into the battle zone, you may draw a card.Liquid People freely control liquid. For them, water is armor and shield.

4

x

Aqua Surfer (SotM)

Collector Number: 16

Rarity: Uncommon

Type: Creature

Race: Liquid People

Power: 2000

Mana Number: 1

Cost: 6

Civilization: Water

Artist: Yoshio Sugiura

Card text:

Shield trigger (When this creature is put into your hand from your shield zone, you may summon it immediately for no cost.)When you put this creature into the battle zone, you may choose a creature in the battle zone and return it to its owner's han"Wave goodbye!"

4

x

Corile (ECoD)

Collector Number: 14

Rarity: Common

Type: Creature

Race: Cyber Lord

Power: 2000

Mana Number: 1

Cost: 5

Civilization: Water

Artist: Hikaru Ikusa

Card text:

When you put this creature into the battle zone, choose one of your opponent's creatures in the battle zone and put it on top of his deck.When the cataclysm struck, all the science of the Cyber Lords couldn't prevent the collapse of their underwater city.

4

x

Crystal Paladin (ECoD)

Collector Number: S2

Rarity: Super Rare

Type: Evolution Creature

Race: Liquid People

Power: 5000

Mana Number: 1

Cost: 4

Civilization: Water

Artist: Eiji Kaneda

Card text:

Evolution-Put on one of your Liquid People.When you put this creature into the battle zone, return all creatures in the battle zone that have "blocker" to their owners' hands.

2

x

Crystal Spinslicer (SWotSR)

Collector Number: 33

Rarity: Rare

Type: Evolution Creature

Race: Liquid People

Power: 5000

Mana Number: 1

Cost: 2

Civilization: Water

Artist: Seki

Card text:

Blocker (Whenever an opponent's creature attacks, you may tap this creature to stop the attack. Then the 2 creatures battle.)Evolution-Put on one of your Liquid People.

"I don't like to play catch. I like to play throw."

4

x

Emeral (RotSW)

Collector Number: 14

Rarity: Common

Type: Creature

Race: Cyber Lord

Power: 1000

Mana Number: 1

Cost: 2

Civilization: Water

Artist: Dai

Card text:

When you put this creature into the battle zone, you may add a card from your hand to your shields face down. If you do, choose one of your shields and put it into your hand. You can't use the "shield trigger" ability of that shield."If you think I'm good at this, watch me play video games!"

When you put this creature into the battle zone, if you have a Cyber Lord in the battle zone, draw up to 3 cards.The Cyber Lords' devotion to beauty is so extreme, they even designed their warrior race to have a pleasant appearance.

I suggest that if ur adding these cards following cards are taken away:
Corile (its very good but if ur counting on liquid people...)
Maybe Spiral Gate
Hunter Fish (defensive)
Angler Cluster (defensive)
Brain Serum
Aqua Soldier

I havent checked out the cost balance with these suggestions but when i make a water deck myself soon i can give further advise on that point